Zephyr

Zephyr is a term with several related uses. In classical mythology, Zephyr (from Greek Zephyros) is the west wind, one of the Anemoi, and a personification of a mild, spring-like breeze. In English, zephyr refers to a light, refreshing breeze and is used poetically to evoke gentleness and mildness.

Beyond weather, the name is used in culture and branding to denote lightness or speed, and appears in literature, film, and product names, as well as fictional characters and places.

In technology, Zephyr Project is an open-source real-time operating system for connected, resource-constrained devices. Initiated under the Linux Foundation in 2016, Zephyr is licensed primarily under Apache 2.0 and supports architectures including ARM Cortex-M, x86, ARC, and RISC-V; it emphasizes small footprint, modularity, and security for IoT devices.

The name has also been used for transportation, notably the Pioneer Zephyr, a 1934 diesel-powered streamlined train; other uses include trains named Zephyr in different services.